\begin{tabular}{lcccc} \hline
 & (1) & (2) & (3) & (4) \\
VARIABLES & ASC OLS & ASC IV & ASC OLS & ASC IV \\ \hline
 &  &  &  &  \\
ln $\Delta$ IPW (1991-2015) & 0.065*** & 0.066*** &  &  \\
 & (0.023) & (0.024) &  &  \\
ln $\Delta$ IPW (2000-2007) &  &  & 0.050** & 0.127*** \\
 &  &  & (0.021) & (0.043) \\
Female & 0.027 & 0.027 & 0.030 & 0.034 \\
 & (0.028) & (0.028) & (0.029) & (0.029) \\
Age & 0.005*** & 0.005*** & 0.005*** & 0.005*** \\
 & (0.001) & (0.001) & (0.001) & (0.001) \\
Higher Cert. & -0.105*** & -0.105*** & -0.108*** & -0.110*** \\
 & (0.039) & (0.039) & (0.039) & (0.039) \\
University & -0.233*** & -0.232*** & -0.234*** & -0.229*** \\
 & (0.031) & (0.031) & (0.031) & (0.032) \\
Married & 0.103*** & 0.103*** & 0.100*** & 0.100*** \\
 & (0.024) & (0.024) & (0.023) & (0.023) \\
\% non-UK born & -0.001 & -0.001 & -0.001 & 0.002 \\
 & (0.001) & (0.001) & (0.002) & (0.002) \\
$\Delta$ \% non-UK born & 0.002 & 0.002 & 0.002 & 0.001 \\
 & (0.002) & (0.002) & (0.002) & (0.002) \\
 &  &  &  &  \\
Observations & 1,793 & 1,793 & 1,788 & 1,773 \\
R-squared & 0.129 & 0.129 & 0.126 & 0.118 \\
 TTWAs & 239 & 239 & 238 & 232 \\ \hline
\multicolumn{5}{c}{ Robust standard errors in parentheses} \\
\multicolumn{5}{c}{ *** p$<$0.01, ** p$<$0.05, * p$<$0.1} \\
\end{tabular}
